Enantioselective Intramolecular Carbene C–H Insertion Catalyzed by a Chiral Iridium(III) Complex of<i>D</i><sub>4</sub>-Symmetric Porphyrin Ligand
作者:Jing-Cui Wang、Yan Zhang、Zhen-Jiang Xu、Vanessa Kar-Yan Lo、Chi-Ming Che
DOI:10.1021/cs4001656
日期:2013.6.7
The synthesis of iridium(III) complexes containing bulky porphyrin ligands is described. The chiraliridium(III) complex of the D4-symmetric Halterman porphyrin ligand [Ir((+)-D4-Por)Me(L)] (L = solvent) is an effective catalyst for enantioselective intramolecular carbene insertion into saturated C–H bonds of α-diazoesters, giving the corresponding cis-β-lactones in good isolated yields (up to 87%)
描述了含有庞大的卟啉配体的铱(III)配合物的合成。D 4-对称Halterman卟啉配体[Ir((+)- D 4 -Por)Me(L)](L =溶剂)的手性铱(III)络合物是将对映选择性分子内卡宾插入饱和C中的有效催化剂α-二重氮酸酯的-H键,以良好的分离产率(最高87%),优异的立体选择性(仅顺式产物)和良好的对映选择性(最高78%ee)提供相应的顺式-β-内酯。